1998517463 has 2 divisors, whose sum is σ = 1998517464. Its totient is φ = 1998517462.

The previous prime is 1998517379. The next prime is 1998517483. The reversal of 1998517463 is 3647158991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1998517463 - 2²⁰ = 1997468887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1998517483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999258731 + 999258732.

It is an arithmetic number, because the mean of its divisors is an integer number (999258732).

Almost surely, 2^1998517463 is an apocalyptic number.

1998517463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998517463 is an equidigital number, since it uses as much as digits as its factorization.

1998517463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 53.

The square root of 1998517463 is about 44704.7812096201. The cubic root of 1998517463 is about 1259.6096596787.

The spelling of 1998517463 in words is "one billion, nine hundred ninety-eight million, five hundred seventeen thousand, four hundred sixty-three".